The function of connecting rod is to
a) Transmit the piston motion to the crankshaft
b)Turn the flywheel
c)Turn the fuel pump
d) Turn the drive plate

In a 4 — stroke diesel engine the fuel is injected into the combustion chamber at the end of stroke-
a) Suction
b) Compression
c) Power
d) Exhaust

Which is the hottest portion of the poppet valve during operation in I-C. engine?
a)Valve face
b) Valve head
c) Valve stem
d) Valve neck

The period in crank angle at which both inlet and exhaust valves remains in open position at the end of exhaust and beginning of induction stroke is called
a)Valve lead
b) Valve lag
c) Valve overlap
d) Valve throw

The diesel fuel is rated by
a)Octane number
b) Cetane number
c) Flash point
d) Fire point

For water cooled engine generally the butt gap of piston ring 0.12 mm. is provided for every
mm. bore diarneter. c) 20d) 25
17.When the gudgeon pin (piston pin ) is free, both in piston bosses as well as in small end of the connecting rod, the type of locking method of piston pin is called a) Semi — floating b) 'Three quarter floating

c)Free pind) Fully Floating

Which type of cylinder liner outer surface does not have direct contact with liquid coolant or water?
a) Dry liner
b) Wet liner
c)Semi wet liner
d) None of these

Disadvantage of Pre combustion chamber is
a) Power loss
b) Problem of leakage of change
c)Cold starting problem
d) None of these

The function of flywheel is to
a) Maintain the speed of crank shaft
b) Transmit the engine power to the transmission system
c) Start the engine with the help of starter ring fitted on itd) All of the above

The disadvantage of air cooling system is —
a) Effciency is lower than water cooling system
b) Working temperature remains high
c) Heat removal rate highly depends on the atmospheric temperature.
d) All ofthe above

The function of injector is to inject fuel to the combustion chamber in —
a)Droplet form
b) Atomized form
c) Liquid form
d) Any form

The advantage of dry gump lubrication system is
a)It reduces the engine height
b) Better lubrication
c) The system is cheapd) Less quantity of oil required

The super charger is called Turbo charger when the turbine of the super charger is driven by
a) Engine power
b) Exhaust gases of engine
c) AC 230 volts supply
d) Vehicle battery
a) Governorb) Injector
c) Camshaft of FIPd) None of these

Plunger type fuel feed pump of diesel engine is operated by —

The full form of CRDI is -a) Common Rail Direct Injection
b) Common Rail Diesel Injection
c) Common Rate Diesel Injection d) Common Rate Direct Injection

Which one of the following toxic components of exhaust gas separates oxygen in three way catalytic converter?
a)CO
b) HC
c) NOX
d) N2

IvVhich one of the toxic component is reduced by an EGR system?
a)NOX
c)HCd) CO
36. Starter motor runs but pinion does not engage with ring gear of fly wheel the probable cause is —
c) Defective splines
37. Loss of compression may cause —Any one of the abovea) Excessive fuel consumptionb) Noisy Enginec) Engine back firesd) Smoky exhaust a) Worn out pinion teethb) Worn out teeth of ring gear

38."The engine is noisy" the probable cause is —a) Use of low octane fuelb) Loose piston pin c) Broken piston ringjd) Any one of the above
39.What is the full form of SAE?a) Special Automobile EngineB) Society of Automotive Engineers c) Society of Automotive Enginesd) None of these
40. Which of the following multi grade oil is used in modern car engine?

-5-
42.Most commonly used water / liquid cooling system is —
a)Thermo Syphon Systemb) Impeller thermo syphon system p) Pump Circulation Systemd) Any one of the above
43.For a given size of engine, the power output, with super charger is able to increase by o.
a)20-30b) 30 — 40c) 40 - 50d) 50 - 60
44.In oil bath air cleaner which oil is used?pa) Engine oilb) Gear oil

c) Brake oild) Spindle oil
45.Ignition warning lamp does not light even after switching on the ignition key, the probable cause is —
a)Lamp bulb burnt out
b)Fuse blown off
c)Open circuit between lamp and Ignition switch Any one of the above
46.Which of the following is not a component of charging circuit?

a)Batteryb) Starter solenoidc) Generatord) Ammeter
47.Alternating current produced by alternator is converted to Direct current with the help of

a)Transistorb) Commutators p) Rectifierd) Condensers
48.When the charging system is fitted with alternator then which component is blocking the reverse flow of current from the battery?,a) Rectifier diodesb) Cut outc) Voltage regulatord) Current regulator
49.Which of the following is not the cause of "engine over heating"?
a)Lack of coolantwb) Wheel wobble